Oil/water separation techniques: a review of recent progresses and future directions

Gupta, Raju Kumar; Dunderdale, Gary J.; England, Matt W.; Hozumi, Atsushi

doi:10.1039/c7ta02070h

Cited by 954 publications

(455 citation statements)

References 221 publications

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“…Ac eton e, pr opa no l, dimethylformamide (DMF), and n-methyl-pyrrolidone (NMP) were obtained from Loba Chemie India. H 2 SO 4 , NaNO 3 , KMnO 4 , and H 2 O 2 were purchased from Merck, India. Organic dye (oil red IV, practical grade) was purchased from HiMedia Laboratories Pvt.…”

Section: Methodsmentioning

confidence: 99%

“…selectivity, high absorption capacities, stability, and recyclability [7,8]. In this regards, metal oxide, inorganic clay, magnetic materials, polymer microfiber bundles, polymer-based superhydrophobic materials, and sponge-like aerogels have been explored for oil-water separation because of its high surface area, coupled with excellent mechanochemical stability, and hydrophobicity [4,[9][10][11][12][13]. In addition, metal meshes have also been reported explored for oil-water separation but have limitations of low separation efficiency and poor cyclability [14,15].…”

Section: Introductionmentioning

confidence: 99%

“…To date, oil spill remains a real threat to natural habitats, and there are few solutions to resolve this problem. Traditional methods of centrifugation, oil skimmer, flotation, and gravitational separation suffer due to poor efficiency and long cycle times for efficient separation of oil from water [3,4]. Also, conventional remedies like mechanical extraction, chemical degradation, and in situ burning for massive oil spills are inefficient and require high operational cost [5].…”

Section: Introductionmentioning

confidence: 99%

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Reduced graphene oxide-coated cotton as an efficient absorbent in oil-water separation

Dashairya

Rout

Saha

2017

Adv Compos Hybrid Mater

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The present work describes the fabrication of superhydrophobic and superoleophilic reduced graphene oxide-coated cotton (rGO@cotton) by a facile one-step hydrothermal used method for oil-water separation. Results from X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and field emission scanning electron microscopy (FESEM) analysis show the formation of a composite structure with the presence of an ultrathin coating of rGO on the cotton fibers. The contact angle (CA) between a static water droplet and the rGO@cotton surface in air was measured~162.9°, which suggests the formation of a superhydrophobic surface on the synthesized product. Moreover, the rGO@cotton showed excellent absorption capacity for oils where 1 g of rGO@cotton was able to remove~30-40 g of various oils in the first cycle from oil-water mixtures. The flexible rGO@cotton was reusable and demonstrated oil retention up to~35-50% at the tenth cycle using simple sorption-mechanical squeezing test. Overall, the present work identifies that the rGO@cotton is an efficient absorbent for effective separation of oil from oil-water mixtures.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Reduced graphene oxide-coated cotton as an efficient absorbent in oil-water separation

Dashairya

Rout

Saha

2017

Adv Compos Hybrid Mater

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“…1,2 At present, wastewater treatment methods mainly include coagulation, sedimentation, flotation, extraction, adsorption, chemical oxidation, membrane method, ozonation, and photocatalysis. However, mining, textile, petrochemical, and other industries produced large quantities of wastewater containing petroleum, dyes, and other pollutants.…”

Section: Introductionmentioning

confidence: 99%

High‐performance composite photocatalytic membrane based on titanium dioxide nanowire/graphene oxide for water treatment

Zeng

Xia

et al. 2019

J of Applied Polymer Sci

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In this study, a novel dopamine-modified TiO 2 nanowire (NW)-intercalated graphene-oxide-based photocatalytic (NWC) membrane was prepared by vacuum-assisted filtration using a commercial cellulose acetate membrane as a support layer. At the same time, compared with the synthesized reduced graphene-oxide/polydopamine/TiO 2 nanoparticle composite (NPC) membrane, it was found that the NWC membrane has high water flux (273 L m −2 h −1 ) and removal rate (above 98%) on the dye-oil emulsion. After 5 cycles of experiments, the NWC membrane maintained a relatively stable permeation flux and removal rate, which was significantly better than the NPC membrane. The results showed that the NWC membrane had a more uniform distribution of TiO 2 NW, and had better antifouling ability, recyclability, and photocatalytic performance than NPC membrane. In summary, the NWC photocatalytic membrane of this study shows excellent water purification potential and provides a new path for photocatalytic water treatment.

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“…This is becoming the biggest bottleneck that limits large-scale industrial application in the area of oil-water separation. 26 In order to solve this problem and improve the mechanical properties of the surface of superhydrophobic materials, many methods have been proposed. [27][28][29][30][31][32][33][34][35][36][37][38] Lu et al 27 used a peruorosilane-coated titanium dioxide nanoparticles ethanolic suspension as a paint to fabricate micro-nano multi-level structure, with commercial adhesives as a binding layer to improve the robustness and abrasion resistance, to construct robust superhydrophobic surfaces on several substrates, which maintained excellent superhydrophobicity even aer nger-wipe, knifescratch, and sandpaper abrasion.…”

Section: -8mentioning

confidence: 99%

Biomimetic fabrication of superhydrophobic loofah sponge: robust for highly efficient oil–water separation in harsh environments

Lin

Chen

et al. 2018

RSC Adv.

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Oil/water separation has become an increasingly important field due to frequent industrial oily wastewater emission and crude oil spill accidents. Herein, we fabricate a robust superhydrophobic loofah sponge via a versatile, environmentally friendly, and low-cost dip coating strategy, which involves the modification of commercial loofah sponge with waterborne polyurea and fused SiO 2 nanoparticles without the modification of any toxic low-surface-energy compound. The as-prepared loofah sponge showed excellent superhydrophobic/superoleophilic properties and exhibited robustness for effective oil-water separation in extremely harsh environments (such as 1 M HCl, 1 M NaOH, saturated NaCl solution and hot water higher than 95 C) due to the remarkably high chemical stability. In addition, the as-prepared loofah sponge was capable of excellent anti-fouling, has self-cleaning ability and could act as the absorber for effective separation of surfactant-free oil-in-water emulsions. More importantly, the asprepared loofah sponge demonstrated remarkable robustness against strong sandpaper abrasion and finger wipes, while retaining its superhydrophobicity and efficient oil/water separation efficiency even after more than 50 abrasion cycles. This facile and green synthesis approach presented here has the advantage of large-scale fabrication of a multifunctional biomass-based adsorbent material as a promising candidate in anti-fouling, self-cleaning, and versatile water-oil separation.

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Oil/water separation techniques: a review of recent progresses and future directions

Abstract: The recent progress of oil/water separation technologies using various materials that possess surface superwetting properties is summarized.

Cited by 954 publications

References 221 publications

Reduced graphene oxide-coated cotton as an efficient absorbent in oil-water separation

Reduced graphene oxide-coated cotton as an efficient absorbent in oil-water separation

High‐performance composite photocatalytic membrane based on titanium dioxide nanowire/graphene oxide for water treatment

Biomimetic fabrication of superhydrophobic loofah sponge: robust for highly efficient oil–water separation in harsh environments

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